Electrically-heated foot-warmer.



F. KUHN. ELECTRIGALLY HEATED FOOT WABm. uPLIoATIoN HLBD uns, 1912.

Patented Feb. 17, v1914:.

O Illllllll llo FRANK KUHN, lor DETROIT, MICHIGAN.

ELECTRICALLY-HEATED FOOT-'WARMEIhf Specification of Letters Patent.

Patented Feb. 17, 1914.

Application mea April 9, 1912. serianN'o. s893544.

f' lll 'whom it may concern:

Beitknown that I, FRANK KUHN, aciti-I entf theuniad states of America, residat Detroit, in the county of Wayne and Staterof Michigan, have invented certain new' and Useful Improvements in ElectriealllyHeated Foot-vVarmers, of which the following is a specification, reference being had .therein to the accompanying drawings.

The invention relates to electrically heated 'foot warmers and consists in the constructin as hereinafter set forth.

In the drawings, Figure 1 is a plan view of the warmer with one of the cover plates removed; Fig. 2 is an enlarged cross-section on the line :vof Fig. 1, and Fig.f8 is a plan of the complete structure.

'improved warmer is in the form of a ,Jatoard of any desired length and width .ofy only slight thickness.

Itconsistsessent'ially of an open-centerand substantially rectangular frame A nf the desired dimensions, said frame being Brovided at top and bottom with inwardly xtending flanges B to which are secured, fiat top and bottom plates C and D. The whole structure is then covered with carpet o`r other suitable fabric as at E and at opposite ends are metallic caps F and G which hold this cover in place. Within the cham-- ber is arranged a suitable resistor H which v'Q -.'xtends around over electrically insulated lrpporting posts I and their ends are connected with terminal contacts J which are 4Ir'ated in a socket member K secured to n'd projecting inward from one end of the frame. The posts I are preferably attached.

to cross bars K secured to the inner face of the flanges B, as show n in Fig. 2. The space within the chamber surrounding the resistor may be filled in with any suitable heat distributing and absorbing body such for instance as a mass of silica sand and cement,

' out danger of short circuiting. The resistor is preferably vlocated in a plane nearer the top of the ease than the bott-omiso that a greater amount of heat .will pass upward than downward.

In use it is merely necessary to place the resistor in circuit by means of a suitable connector such as L and the desired heating effect will 'be produced.

- W'hat I, claim as my invention is nal contacts in said socket, a resistor connected .with said terminal contacts and extending back and forth longitudinally of said frame, and a heat conducting electrical insulating material filling thev space within said frame between said plates surrounding said resistor.

3. The combination with an open-'centered frame, the sides having in-turn'ed angeson one of their edges, spaced cross-bars arranged beneath and connected to Y said flanges, insulator osts 'carried by said cross-bars, an electrlc'resistance attached to saidposts, the sides of the open centered frame having the opposite edges provided with in-turned flanges, top and bottom cover plates arranged over the exterior faces of and connected to sa' flanges, and a heat conducting and ele trical .insulating me-v dium surrounding said reslstor and filling the space within the frame.

In testimony whereof I affix my signature in presence of two witnesses.

FRANK KUHN. lVitnesses: WV. J. BELKNAP,

DELBERT COLLINS. 

